MySQL error in file: /engine/modules/top250.php at line 126

Error Number: 1

The Error returned was:
Can't create/write to file '/home/mysqltmp/#sql_820_1.MAI' (Errcode: 28 "No space left on device")

SQL query:

SELECT p.id, p.date, p.short_story, p.xfields, p.title, p.category, p.alt_name FROM dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) WHERE category='6' ORDER BY rating DESC LIMIT 250